Gun-mounting.



'No. 734,406. PATENTED JULY 21, 1903. A. T. DAWSON & W. BURTON. GUN MOUNTING.

APPLICATION FILED MAR. 16, 1903. I

HO MODEL. 2 SHEETS-SHEET l.

"No. 734,406. PATENT-ED JULY 21,1903. T. DAWSON @z-W. B N oN. GUN MOUNTING 2 SHEETS-SHEET 2.

gamma; WZ fiawaw APPLICATION FILED MAIN. 16, 1903.

B0 MODEL.

No. I 784,406.

Patented July 21, 1903.

A THU TREVOR DAWsori AND WALTER BURTON, or WESTMINSTER, ENGLAND, ASSIGNORS TO vIcKERs sons & MAXIM,LIM1TED, OF LON- DON, ENGLAND.

GUN-MOUNTING.

SPECHIGATION forming part of Letters Patent No. 734,406, dated July 21, 1903.

Application filed March 16, 1903. Serial No. 148,068. (No model.)

To all whom it may'conoernw Be it known that we,AR'rHUR TREVOR DAW- SON, lieutenant of theRoyal Navy, director and superintendent of ordnance works, and WALTER BURTON, engineer, both subjects of the King of Great Britain, residing at 32 Victoria street, Westminster, in the county of London, England, have'invented certain new and useful Improvements Relating to Gun- Mountings, of which the following is a specification.

. This invention has reference to gun-mountings, particularly those of the kind used for According to our invention we form the cross-head with slots or gaps extending ra- -dial ly from the trunnion-bearings, so that the oint-pm or trunnion of the gun can be in- 'when mounting the gun.

serted laterally into the trunnion-bearings One member of said cross-head isfurnished with inclined surfaces, with which corresponding inclined projections onthe joint pin or trunnion are adapted to engage by an angular movementof the latter to lock the said joint-pin or trunnion to the cross-head.

We will now describe our invention more fully with reference to the accompanying drawings, in Which- I Figure 1 is a side elevation of the gun and its j oint-pin or trunnion mounted in the crosshead in accordance with ourinvention. Fig. 2 is a side elevation of the said gun and its joint-pin or trunnion removed from the crosshead. Fig. 3 isa side elevation, and Fig. 4 a front elevation, of the said cross-head. Fig. 5 is a sectional front elevation of the said cross-head with the joint-pin or trunnion in place therein, the gun being indicated in dotted lines.

7 a'plan, and Fig. 8 a cross-section on the line 1 1,showingthe joint-pin detached. Figs. 9 and 10. are respectively a front view and a side view of a nut for said joint-pin.

Fig. Bis a side elevation, Fig.

A is the gun,'B the cross-head, and C the joint-pin or trunnion. The forked members I) b are radially slotted or gapped at b and one of them (viz., b) has a plate or disk of steel or other appropriate metal I) secured on the outer face thereof by rivets b or other suitable retaining devices. This disk or plate is slotted or gapped in correspondence with the slotted or gapped portion of the crosshead and is provided with inclined curved surfaces 1 b The joint-pin O is formed with cylindrical portions 0 c,'which fit the holes in the members b b of the cross-head, these portions being also formed with flats c c to suit the slots or gaps b so that said'joint-pin can be passed laterally into place within the The joint-pin also has near one of its ends two inclined projections c 0 which correspond with the aforesaid inclined surfaces b on the plate or disk b bent to form ahandle c and the opposite end ance with the width of the jaws of the cross! head. Said nut is formed with numerous radial grooves o c, and the threaded end 'ofthe joint pin has a transverse hole 0 therein, so that when the nut has been adjusted in the required position it can be locked in such position by a split pin passed through said hole 0 or by other appropriate means. The central portion of the joint-Jpin is cylindrical and fits the gun loosely, so that when the parts are mounted in the crosshead the gun can be turned'about said central cylindrical portion in varying its angle of elevation. The said joint-pin can be left in position in the gun when the latter is dismounted, so that it will only be necessary to slide the flattened portions 0' c of the jointpin through the said slots or gaps b of the cross-head in order to mount the gun. Then by moving. the joint-pin angularly by means of its handle 0 the aforesaid inclined projections c thereon will be caused to engage with the inclined surfaces 11 of the aforesaid securely clamped in place in the cross head cross-head through the said slots or gaps.-

The end of the joint-- pin adjacent to said inclined projections c is s screw-threaded at c to receive the nut 0 which can be adjusted thereon in accorddisk or plate b whereby the joint-pin will be 1 and the gun be capable of turning thereon during its elevation or depression. We prefer to place the said disk or plate 12 on the left-hand member of the cross-head, as shown in the drawings.

What we claim, and desire to secure by Letters Patent of the United States, is.-

1. In a gun mounting; the combination with the cross-head, of a rotary joint-pin carried by the gun, radially-slotted bearings in the cross-head for enabling said pin to be laterally inserted into said bearings and means for locking said pin in the bearings by an angular movement thereof, substantially as described.

2. In a gun mounting; the combination with the cross-head, of a rotary joint-pin carried by the gun, inclined projections on said pin, radially-slotted bearings in thc crosshead, and inclined surfaces on one of the forked members of said cross-head for the said in- I clined projections of the joint-pin to engage with when the latter is angularly moved substantially as described.

3. In a gun -mounting; the combination with the cross-head, of a rotary joint-pin carried by the gun, inclined projections on said pin, radially-slotted hearings in the crosshead, flattened portions on said joint-pin to enter said radial slots of the bearings, and in- 30 clined surfaces on the outer face of one of the forked members of said cross-head for said inclined projections of the joint-pin to engage with, substantially as described.

4. In a gun-mounting; the combination 35 with the cross-head, of a rotary j oint-pin carried by the gun, inclined projections near one end of said pin, an adjustable nut near the other end of said pin,radially-slotted hearings in the cross-head, flattened portions on said 0 pin to enter the radial slots of the bearings, a plate provided with inclined surfaces and adapted to be aflixed to the outer face of one of the forked members of said cross-head for said vinclined projections of the joint-pin to 45 engage with, and a crank-handle on said j oint- 

